Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Skin surface pH in females and males. Significant differences are shown in the figure. The number of subjects in each group is detailed in table 1. a On the forehead in females. b On the forearm in females. c On the forehead in males. d On the forearm in males.
